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  • Sirio Gain-Master Hi-Tech Fiberglass 10m & CB Base Antenna
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Sirio Gain-Master Hi-Tech Fiberglass 10m & CB Base Antenna


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  • Type 0.625 wavelength center feeded vertical dipole; Frequency Range @ SWR <=2.0 25.5 - 30 MHz 400 CB channel & 10m ham band
  • Impedance 50 Ohms; Radiation Omnidirectional; Polarization Linear Vertical
  • Max Gain on the horizon 1 to 2 dB higher than conventional 5/8 wavelength
  • Max Power 500 Watts (CW) continuous, 1000 Watts (CW) short time
  • Ligthning protection All metal parts are DC-grounded, the inner conductor shows a DC-short
1 new from $189.00

Technical Details

  • Brand Name: Sirio Antenna
  • Model: gainmaster
  • Item Package Quantity: 3

Product Details

  • Product Dimensions: 79 x 5 x 5 inches ; 19 pounds
  • Shipping Weight: 5 pounds
  • ASIN: B0071HZ8U2
  • Item model number: gainmaster
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (7 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: January 25, 2012

Product Description

completely designed by electromagnetic simulation to achieve the maximum gain and optimize the radiation pattern and bandwidth. Engineered with the most advanced available technologies it is completly manufactured in Italy with high quality materials. The new design of the radiant element (Patent Pending) works like a central feeded dipole so all RF currents on the radiator are in-phase and the ground plane radials are not necessary. The coaxial coil at the bottom works like RF-choke for the optimum decoupling from mast and feeding line. Made of telescopic fiberglass tubes, it is DC-grounded for the best protection from static discharges.

Customer Reviews

4.7 out of 5 stars
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Most Helpful Customer Reviews

2 of 2 people found the following review helpful By Richard A. Akin on March 2, 2012
Verified Purchase
I received the Sirio Gainmaster Antenna I ordered and was pleased with the prompt shipping and careful packaging. I was even more pleased when I installed the antenna and made my first radio contact to a radio operator several thousand miles away. I would recommend this antenna to anyone who is interested in exceptional quality and prompt service. I couldn't be more pleased with this transaction.
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Verified Purchase
The antenna is good design and works very will. It arrived quickly and in great condition. The only thing I worry about a little is the radome construction. It seems a little flimsy but maybe that was necessary to allow flexing in the wind, snow, and ice. My concern is that the split ends where one section inserts in to the other could break. If you only put the antenna up once (which is probably what most people will do) it will be just fine. The quality of the rest of the antenna appears to be excellent. And of course you can't beat the bandwidth.
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By William E. Lauterbach on November 9, 2013
Verified Purchase
Works for MY purposes - ten meters only. 11 meters; SWR goes a little higher. 12 meters; SWR is close to 2 to 1. However, I am using this for DX on ten meters exclusively. I have it mounted low to the ground, about 16 feet above ground. I would not go very high with this since it is a very lengthy antenna and I would be skeptical about their wind specification claims. I have talked from Japan to Germany; Alaska to Brazil with just 100 watts. Nice, low noise DX antenna. BTW, EXTREMELY easy to put together. I liked that.
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Verified Purchase
Arrived quickly and was easy to assemble. All the metal parts are stainless steel or other rust-free alloys. The fiberglass sections seem to be almost twice as thick as other vertical antennas I have used previously. I installed it at the peak of my roof on a four foot tripod, with a heavy copper ground strap to Earth ground. Even when the band is not "open" I can tell from contacts with locals that this antenna is a good performer. When conditions are right, I have made some 1,000 mile+ contacts with my 30-50W transceiver. My SWR is nearly perfect.

The Sirio Gain-Master also works on CB frequencies (27Mhz) but I have not tested that band yet. There are NO elements to tune at initial set-up or when switching bands later.

I did notice one point of concern... a paper insert with the antenna suggests adding synthetic guy lines (not wires!) in area of very high winds. My antenna went through one storm with wind gusts about 50MPH and did swing around a bit but survived. I'm not too worried about it. Maybe if I lived along the coast or a mountain top, I might consider Kevlar guy lines.

I'll post an update if anything changes. 73.
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